Maximal longitudinal spacing of stirrups based on shear (9.2.2(6))

The maximal longitudinal spacing between stirrups links should not exceed maximal value defined in 9.2.2(6). Check looks as follows. Calculation of maximal defined longitudinal distance of stirrups s_l.

Furthermore maximal allowed longitudinal distance between stirrups is calculated as follows

s_l,max = 0,75∙d∙(1+cotg (α))

where:

d - effective depth of cross-section
α - angle of stirrups to longitudinal axis of the member

Finally unity check is calculated as follows:

UC_9.2.2(6) = s_l/ s_l,max.

Clause 9.2.2.(6) - Maximal longitudinal spacing of stirrups for National annex

There are the following differences in particular NA.

National annex	formula
Standard NA	0,75∙d∙(1+cotg (α))
Austrian ÖNORM-EN NA	max(0,75∙d∙(1+cotg (α)); 250 mm)
Czech ČSN-EN NA	max(0,75∙d∙(1+cotg (α)); 400 mm)
French NF-EN NA	for h ≤ 250 mm s_l,max= 0,9∙d for h > 250 mm s_l,max= max(0,75∙d∙(1+cotg (α))
German DIN-EN NA	for V_Ed≤ 0,3∙V_Rd,max for f_ck≤ 50 MPa→ s_l,max= max(0,7∙h; 300 mm) for f_ck> 50 MPa→ s_l,max= max(0,7∙h; 200 mm) for V_Ed< V_Rd,c; h < 200 mm and beam s_l,max= 200 mm for 0,3•V_Rd,max< V_Ed≤ 0,6∙V_Rd,max for f_ck≤ 50 MPa → s_l,max= max(0,5∙h; 300 mm) for f_ck> 50 MPa → s_l,max= max(0,5∙h; 200 mm) for V_Ed> 0,6∙V_Rd,max s_l,max= max(0,25∙h; 200 mm)
Slovak STN-EN NA	max(0,75∙d∙(1+cotg (α)); 400 mm)